Flight number record
OO 4664
SkyWest Airlines · Denver to Bismarck
- Route
- DEN → BIS
- Departs
- 13:40
- Flights
- 270
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4664, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 4664 lands a B, level with the national rate of 77.6%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 270 flights, with a median arrival 9 minutes early.
Key figures
On time
78.1%
Arrivals under 15 minutes late, of 265 completed flights
Avg delay
98 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
National rate is 1.81%
1 hour+ late
12.1%
National rate is 8.1%
These figures cover 270 flights between July 2025 and June 2026. Beyond the headline rate, 12.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When OO 4664 flies
OO 4664 flies DEN to BIS without a single fixed slot. Its most common scheduled departure was 13:40, used on 102 of 270 flights, with 13:45 (86 flights) and 13:55 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 13:40102 flights37.8%
- Departs 13:4586 flights31.9%
- Departs 13:5545 flights16.7%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4664 runs level with that at 78.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 4664 next to DEN to BIS
Every carrier on DEN to BIS combined arrived on time 76.2% of the time across 1,502 flights, so OO 4664 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4664thin sample | 270 | 78.1% | 98 min | 1.11% | B |
| All SkyWest Airlines on DEN–BIS | 1,502 | 76.2% | 88 min | 0.73% | B+ |
| All carriers on DEN–BIS | 1,502 | 76.2% | 88 min | 0.73% | B+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4664 quarter by quarter
OO 4664 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.7% on time and its weakest Jan–Mar 2026 at 68.6%, a swing of 15 points on roughly 90 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202592 flights83.7%
- Oct–Dec 202591 flights81.6%
- Jan–Mar 202687 flights68.6%
Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4664 did best on Wednesday at 84.2% on time and worst on Monday at 71.1%. Each day rests on about 39 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 4664 runs late
One category carries most of the weight here. Carrier accounts for 47% of the 5,705 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 47%Carrier
- 34%Late-arriving aircraft
- 17%National Airspace System
- 3%Extreme weather
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 2,653 of the 5,705 delay minutes reported here. The split is drawn from 5,705 delay minutes reported on OO 4664.
Cancellations sit at 1.11% against a national 1.81%, which is ordinary. Diversions add another 0.74%.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 516 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on six other city pairs in the data, including LIT to IAH (53), ORD to CHS (22) and LNK to ORD (11), but none flew often enough under OO 4664 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to BIS only.
One caution: this is a thin sample. 270 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking OO 4664
For a booking, OO 4664 is a flight to put a long connection behind. 12.1% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- DEN to BIS, every carrier and departure
- BIS to DEN, the return direction
- SkyWest Airlines 4663 on the same route83.3%
- SkyWest Airlines 4665 on the same route64.6%
- SkyWest Airlines 4799 on the same route75.2%
- Denver International (DEN) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.